Hot-melt pressure sensitive adhesive packaging, preform, and method

摘要

The present invention is directed to a release package, a preform, of the release package, and a method for releasably packaging a hot-melt pressure sensitive adhesive. The method for releasably packaging a hot-melt pressure sensitive adhesive comprises: coating a face of a continuous sheet of heat sealable film with a silicone coating, said continuous sheet having two opposing longitudinal edges, namely a first longitudinal edge and an opposite longitudinal edge, the coating providing a pattern such that an area along at least one of the two opposing edges is uncoated and capable of forming a heat seal with another uncoated portion of the film; adhering a micronized powder to the siliconized coating of the continuous sheet to form a siliconized and powdered preform; heat sealing the uncoated edge of the preform to the opposite edge of the preform to form a continuous tubular film capable of receiving and powder coating an extruded hot-melt pressure sensitive adhesive therein; extruding a hot-melt pressure sensitive adhesive into the continuous tubular film; and crimping the continuous tubular film at a predetermined distance such that a predetermined amount of the extruded hot-melt pressure sensitive adhesive is isolated and powder coated between at least two of the crimps.